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Interfacial thermal stresses of segmented thermoelectric generators.
- Source :
- Journal of Thermal Stresses; 2023, Vol. 46 Issue 7, p574-587, 14p
- Publication Year :
- 2023
-
Abstract
- The segmented structure can effectively improve the performance of a thermoelectric generator (TEG), but the interfacial thermal stress between adjacent segments seriously threatens the reliability of segmented TEGs. Noticing this, we investigate the mechanical performance of a segmented TEG via theoretical and numerical methods. Results show that the structural stress depends on the ratio of cross-sectional areas between p- and n-type TE legs rather than the absolute cross-sectional areas, while the height ratio of different segments has a significant influence on structural stress. Different from structural stress, the thermal stress induced by unmatched thermal expansion between different segments increases rapidly with the increase of cross-sectional area, and can easily exceed 20% of the total interfacial stress. Besides, both the conversion efficiency and interfacial stress can be optimized by adjusting the ratio of cross-sectional areas. Our results provide the theoretical basis and guidance in the design of segmented TEGs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01495739
- Volume :
- 46
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of Thermal Stresses
- Publication Type :
- Academic Journal
- Accession number :
- 164286162
- Full Text :
- https://doi.org/10.1080/01495739.2023.2208190